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Lima de Miranda V, Gurgel-Gonçalves R, Moreira de Souza RDC, Abad-Franch F. Triatoma costalimai, a neglected vector of Trypanosoma cruzi in the Cerrado savannas of South America: A comprehensive review. CURRENT RESEARCH IN PARASITOLOGY & VECTOR-BORNE DISEASES 2022; 2:100102. [PMID: 36479576 PMCID: PMC9720413 DOI: 10.1016/j.crpvbd.2022.100102] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/18/2022] [Revised: 10/06/2022] [Accepted: 10/31/2022] [Indexed: 06/17/2023]
Abstract
Triatoma costalimai is a little-known triatomine-bug species whose role as a vector of Chagas disease remains poorly understood. To address this gap, we conducted a comprehensive review of the literature and assessed the evidence base from a public-health perspective. We found 89 individual documents/resources with information about T. costalimai. DNA-sequence and cytogenetic data indicate that T. costalimai belongs, together with Triatoma jatai, in a distinct clade within the 'pseudomaculata group' of South American Triatoma. Triatoma costalimai is probably a narrow endemic of the Cerrado on the upper Tocantins River Basin and associated ranges/plateaus; there, the species thrives in the sandstone/limestone outcrops typical of the "Cerrado rupestre" (rocky-soil savanna) and "mata seca decídua calcária" (limestone-soil dry forest) phytophysiognomies. Wild T. costalimai appear to feed on whatever vertebrates are available in rocky outcrops, with lizards and rodents being most common. There is persuasive evidence that house invasion/infestation by T. costalimai has increased in frequency since the 1990s. The bugs often carry Trypanosoma cruzi, often defecate while feeding, have high fecundity/fertility, and, under overtly favorable conditions, can produce two generations per year. Current knowledge suggests that T. costalimai can transmit human Chagas disease in the upper Tocantins Basin; control-surveillance systems should 'tag' the species as a potentially important local vector in the Brazilian states of Goiás and Tocantins. Further research is needed to clarify (i) the drivers and dynamics of house invasion, infestation, and reinfestation by T. costalimai and (ii) the genetic structuring and vector capacity of the species, including its wild and non-wild populations.
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Affiliation(s)
- Vinícius Lima de Miranda
- Laboratório de Parasitologia Médica e Biologia de Vetores, Faculdade de Medicina, Universidade de Brasília, Brasília, Distrito Federal, Brazil
- Departamento de Zoologia, Instituto de Ciências Biológicas, Universidade de Brasília, Brasília, Distrito Federal, Brazil
| | - Rodrigo Gurgel-Gonçalves
- Laboratório de Parasitologia Médica e Biologia de Vetores, Faculdade de Medicina, Universidade de Brasília, Brasília, Distrito Federal, Brazil
- Departamento de Zoologia, Instituto de Ciências Biológicas, Universidade de Brasília, Brasília, Distrito Federal, Brazil
- Núcleo de Medicina Tropical, Faculdade de Medicina, Universidade de Brasília, Brasília, Distrito Federal, Brazil
| | | | - Fernando Abad-Franch
- Núcleo de Medicina Tropical, Faculdade de Medicina, Universidade de Brasília, Brasília, Distrito Federal, Brazil
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Rodrigues DP, Konzen MQ, Decian VS, Hartmann M, Galiano D, Hartmann PA. Response of small mammal species to landscape metrics in a highly fragmented area in the Atlantic forest of southern Brazil. MAMMALIA 2022. [DOI: 10.1515/mammalia-2021-0008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Abstract
The high rate of destruction of natural habitats has diminished fragments size, which negatively impacts small mammal community species richness and composition. We investigated the abundance of small non-flying mammal species in association with three landscape metrics: the size of the fragment (AREA); the shape index of the fragment (SHAPE); and the size of the central area of the fragment (CORE) in six forest fragments in a highly fragmented landscape of southern Brazil. Three rodent species (Akodon montensis, Oligoryzomys nigripes, Sooretamys angouya) and one marsupial species (Gracilinanus microtarsus) were captured in total. We used generalized linear models to test the influence of the landscape metrics on the abundance of the three most abundant species of small mammals captured (A. montensis, O. nigripes and S. angouya). Among the three species analyzed, A. montensis presented a significant negative association with the metric CORE; O. nigripes and S. angouya presented a positive association with the metric AREA and negative with the metric CORE. The negative association of A. montensis, O. nigripes and S. angouya with the core area of the fragments, and the absence of association of all species with the shape of the fragments indicate that these species might benefit from the effects of habitat fragmentation.
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Affiliation(s)
- Daniele Pereira Rodrigues
- Laboratório de Ecologia e Conservação, Universidade Federal da Fronteira Sul, Campus Erechim , ERS 135 - Km 72, n°200 , Erechim , RS , Brazil
| | - Maurício Quoos Konzen
- Laboratório de Ecologia e Conservação, Universidade Federal da Fronteira Sul, Campus Erechim , ERS 135 - Km 72, n°200 , Erechim , RS , Brazil
| | - Vanderlei Secretti Decian
- Programa de Pós-Graduação em Ecologia, Universidade Regional Integrada do Alto Uruguai e das Missões, Campus Erechim , Av. Sete de Setembro, 1621 , Erechim , RS , Brazil
| | - Marilia Hartmann
- Laboratório de Ecologia e Conservação, Universidade Federal da Fronteira Sul, Campus Erechim , ERS 135 - Km 72, n°200 , Erechim , RS , Brazil
| | - Daniel Galiano
- Laboratório de Zoologia, Universidade Federal da Fronteira Sul, Campus Realeza , Rua Edmundo Gaievisk, 1000 , Realeza , PR , Brazil
| | - Paulo Afonso Hartmann
- Laboratório de Ecologia e Conservação, Universidade Federal da Fronteira Sul, Campus Erechim , ERS 135 - Km 72, n°200 , Erechim , RS , Brazil
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Mattos ID, Zimbres B, Marinho-Filho J. Habitat Specificity Modulates the Response of Small Mammals to Habitat Fragmentation, Loss, and Quality in a Neotropical Savanna. Front Ecol Evol 2021. [DOI: 10.3389/fevo.2021.751315] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Landscape conversion of natural environments into agriculture and pasture are driving a marked biodiversity decline in the tropics. Consequences of fragmentation might depend upon habitat amount in the landscape, while the quality of remnants can also affect some species. These factors have been poorly studied in relation to different spatial scales. Furthermore, the impacts of these human-driven alterations may go beyond species loss, possibly causing a loss of ecosystem function and services. In this study, we investigated how changes in landscape configuration (patch size and isolation), habitat loss (considering a landscape gradient of 10, 25, and 40% of remnant forest cover), and habitat quality (forest structure) affect small mammal abundance, richness, taxonomic/functional diversity, and species composition in fragmented landscapes of semideciduous forests in the Brazilian Cerrado. Analyses were performed separately for habitat generalists and forest specialists. We live-trapped small mammals and measured habitat quality descriptors four times in 36 forest patches over the years 2018 and 2019, encompassing both rainy and dry seasons, with a total capture effort of 45,120 trap-nights. Regression analyses indicated that the effect of landscape configuration was not dependent on the proportion of habitat amount in the landscape to determine small mammal assemblages. However, both patch size and habitat loss impacted different aspects of the assemblages in distinct ways. Smaller patches were mainly linked to an overall increase in small mammal abundance, while the abundance of habitat generalists was also negatively affected by habitat amount. Generalist species richness was determined by the proportion of habitat amount in the landscape. Specialist richness was influenced by patch forest quality only, suggesting that species with more demanding habitat requirements might respond to fragmentation and habitat loss at finer scales. Taxonomic or functional diversity were not influenced by landscape structure or habitat quality. However, patch size and habitat amount in the landscape were the major drivers of change in small mammal species composition in semideciduous forests in the Brazilian savanna.
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Cantano LMR, Luchesi LC, Takata JT, Monticelli PF. Behavioral repertoire of the Brazilian spiny-rats, Trinomys setosus and Clyomys laticeps: different levels of sociality. BRAZ J BIOL 2021; 83:e241164. [PMID: 34231655 DOI: 10.1590/1519-6984.241164] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2020] [Accepted: 03/02/2021] [Indexed: 11/22/2022] Open
Abstract
Behavior is a useful trait for comparative studies that provide the comprehension of phylogenetic relationships among species. Here, we present a description of two spiny-rats species' behavioral repertoire, Clyomys laticeps and Trinomys setosus (Rodentia: Echimyidae). The affiliative and agonistic behavioral patterns were sampled during a three-year study of captive populations of wild animals. Observational data were collected in two phases under different arrangements of individuals in groups. We also compare the behavioral traits of T. setosus and C. laticeps with the known behavioral patterns of Trinomys yonenagae. We add categories to the previous descriptions of T. setosus and a standard ethogram for C. laticeps. Trinomys setosus showed a visual and vocal display we called foot-trembling, which was not described in this form and function for other species studied until now. We discuss the differences in their sociality levels and similarities and differences among behavior patterns and repertoires.
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Affiliation(s)
- L M R Cantano
- Universidade de São Paulo - USP, Faculdade de Filosofia, Ciências e Letras de Ribeirão Preto - FFCLRP, Departamento de Psicologia, Laboratório de Etologia e Bioacústica - EBAC, Programa de Pós-Graduação em Psicobiologia em Psicobiologia, Ribeirão Preto, SP, Brasil
| | - L C Luchesi
- Universidade de São Paulo - USP, Faculdade de Filosofia, Ciências e Letras de Ribeirão Preto - FFCLRP, Departamento de Psicologia, Laboratório de Etologia e Bioacústica - EBAC, Programa de Pós-Graduação em Psicobiologia em Psicobiologia, Ribeirão Preto, SP, Brasil
| | - J T Takata
- Universidade de São Paulo - USP, Faculdade de Filosofia, Ciências e Letras de Ribeirão Preto - FFCLRP, Departamento de Psicologia, Laboratório de Etologia e Bioacústica - EBAC, Programa de Pós-Graduação em Psicobiologia em Psicobiologia, Ribeirão Preto, SP, Brasil
| | - P F Monticelli
- Universidade de São Paulo - USP, Faculdade de Filosofia, Ciências e Letras de Ribeirão Preto - FFCLRP, Departamento de Psicologia, Laboratório de Etologia e Bioacústica - EBAC, Programa de Pós-Graduação em Psicobiologia em Psicobiologia, Ribeirão Preto, SP, Brasil
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Caccavo A, Lemos H, Maroja LS, Gonçalves PR. Does stress mess with rodents' heads? Influence of habitat amount and genetic factors in mandible fluctuating asymmetry in South American water rats ( Nectomys squamipes, Sigmodontinae) from Brazilian Atlantic rainforest remnants. Ecol Evol 2021; 11:7080-7092. [PMID: 34141277 PMCID: PMC8207160 DOI: 10.1002/ece3.7557] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2021] [Revised: 03/23/2021] [Accepted: 03/26/2021] [Indexed: 11/20/2022] Open
Abstract
Loss of developmental stability can lead to deviations from bilateral symmetry (i.e. Fluctuating Asymmetry - FA), and is thought to be caused by environmental and genetic factors associated with habitat loss and stress. Therefore, levels of FA might be a valuable tool to monitor wild populations if FA serves as an indicator of exposure to stress due to impacts of habitat loss and fragmentation. In studies examining FA and habitat fragmentation, FA levels are often explained by loss of genetic variation, though few studies have addressed FA's use as indicator of environmental impact. Here, we investigated whether habitat loss, genetic variation, and/or inbreeding affect the developmental instability in Brazilian Atlantic forest populations of a Neotropical water rat (Nectomys squamipes). We sampled individuals from eight sites within Atlantic forest remnants with different amounts of available forest habitat and assessed FA levels with geometric morphometric techniques using adult mandibles. We used observed heterozygosity (Ho) and inbreeding coefficient (Fis), from seven microsatellite markers, as a proxy of genetic variation at individual and population levels. Populations were not significantly different for shape or size FA levels. Furthermore, interindividual variation in both shape and size FA levels and interpopulational differences in size FA levels were best explained by chance. However, habitat amount was negatively associated with both interpopulational variance and average shape FA levels. This association was stronger in populations living in areas with <28% of forest cover, which presented higher variance and higher average FA, suggesting that Nectomys squamipes might have a tolerance threshold to small availability of habitat. Our work is one of the first to use FA to address environmental stress caused by habitat loss in small mammal populations from a Neotropical biome. We suggest that shape FA might serve as a conservation tool to monitor human impact on natural animal populations.
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Affiliation(s)
- Aldo Caccavo
- Programa de Pós‐Graduação em Ciências Ambientais e ConservaçãoPPGCiAC ‐ Instituto de Biodiversidade e Sustentabilidade NUPEMUniversidade Federal do Rio de JaneiroMacaéBrazil
- Setor de MastozoologiaDepartamento de VertebradosMuseu NacionalUniversidade Federal do Rio de JaneiroRio de JaneiroBrazil
- Museu de História Natural do Ceará Prof. Dias da RochaCentro de Ciências da SaúdeUniversidade Estadual do CearáCearáBrazil
| | - Hudson Lemos
- Programa de Pós‐Graduação em Ciências Ambientais e ConservaçãoPPGCiAC ‐ Instituto de Biodiversidade e Sustentabilidade NUPEMUniversidade Federal do Rio de JaneiroMacaéBrazil
| | | | - Pablo Rodrigues Gonçalves
- Instituto de Biodiversidade e Sustentabilidade NUPEMUniversidade Federal do Rio de JaneiroMacaéBrazil
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Machado FS, Moura AS, Mariano RF, Santos RMD, Garcia PO, Oliveira IRC, Fontes MAL. Small mammals in high fragmented landscape in Cerrado/Atlantic Forest ecotone, Southeastern Brazil. IHERINGIA. SERIE ZOOLOGIA 2021. [DOI: 10.1590/1678-4766e2021022] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
ABSTRACT Exploratory human activities have resulted in small fragments inserted into a matrix which is inhospitable to small non-flying mammals. The effects of landscape changes alter the distribution patterns of species. Landscape fragmentation patterns for small mammals are controversial, especially considering small fragments and ecotonal regions. Based on these arguments, we investigated the diversity patterns of small mammals in small fragments in the ecotonal Cerrado/Atlantic Forest region. A total of 24 fragments (<40 ha) were studied using tomahawk, sherman and pitfall traps. We found low species richness (11 species, six marsupials and five rodents), which was not expected because it is an ecotonal region. It was verified that composition and community structure are simplified by the marked presence of generalist species and with the increase of species turnover. The small forest fragments present a microhabitat structure with lianas and streams as main environmental filters of groups with ecological similarities. Our findings suggest that these fragments must be managed in order to conserve the local biodiversity and maintain the needed characteristics to enable the occurrence of different ecological groups.
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Affiliation(s)
- Felipe S. Machado
- Governo do Estado de Minas Gerais, Brazil; Universidade Federal de Lavras, Brazil
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Paise G, Vieira EM, Prado PI. Small mammals respond to extreme habitat fragmentation in the Brazilian Atlantic Forest according to the landscape continuum model. MAMMAL RES 2020. [DOI: 10.1007/s13364-019-00464-z] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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8
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Graça M, Basto P, Rico A, Martinez J, Sanchez-Roman I, Alandia E, Moya M, Revollo-Cadima S, Salazar-Bravo J. Ocorrência de ectoparasitas no roedor Oligoryzomys microtis em regiões ao norte do Departamento de La Paz, Bolívia. ARQ BRAS MED VET ZOO 2020. [DOI: 10.1590/1678-4162-10865] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
RESUMO O objetivo deste trabalho foi mapear e descrever a ocorrência de roedores e seus ectoparasitas nas regiões norte do departamento de La Paz, Bolívia. De abril a maio e julho a agosto de 2017, 80 indivíduos da espécie Oligoryzomys microtis foram capturados em armadilhas vivas. Uma amostra aleatória de 36 indivíduos foi analisada quanto à presença de ectoparasitas, encontrando um total de 458 ectoparasitas. Os roedores foram capturados em dois tipos de ambientes: floresta secundária e áreas cultivadas, sendo a área cultivada a área com maior captação de roedores. Dos ectoparasitas, Laelaps sp. foi o gênero com maior abundância e Mysolaelaps sp. o mais prevalente; o gênero Polygenis sp. é aparentemente descrito pela primeira vez na selva amazônica, exigindo estudos adicionais para entender melhor os patógenos que são transmitidos no parasitismo desta pulga em roedores devido à sua importância no ecossistema e para a saúde pública.
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Affiliation(s)
| | | | - A. Rico
- Global Change Research Institute Bĕlidla, Tchéquia; Universidad Mayor de San Andrés, Bolivia
| | | | | | | | - M.I. Moya
- Museo Nacional de Historia Natural de Bolivia, Brazil
| | | | - J. Salazar-Bravo
- Museo Nacional de Historia Natural de Bolivia, Brazil; Universidad Mayor de San Andrés, Bolivia; Texas Tech University, USA
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Owen RD, Camp JV, Sage R, Rodríguez L, Bruyn VJM, McAllister RC, Jonsson CB. Sympatry and habitat associations of sigmodontine rodents in a neotropical forest-savanna interface. MAMMALIA 2019; 84:227-238. [PMID: 34290454 PMCID: PMC8291367 DOI: 10.1515/mammalia-2019-0036] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
Small mammal communities in the Neotropics are composed largely of sigmodontine rodents. However, many questions regarding these communities remain unanswered, especially those pertaining to fine-scale sympatry and habitat selection. To address this, we examined sigmodontine community structure and vegetation in the western margin of the Upper Paraná Atlantic Forest and the southwestern-most extent of the Cerrado (CE) (an extensive South American savanna ecoregion) of Paraguay. Vegetation classifications were derived from satellite imagery combined with maps based on extensive ground-based surveys. The three most abundant species (Akodon montensis, Hylaeamys megacephalus, and Oligoryzomys nigripes) were found most often in microsympatry with conspecifics, and were negatively associated with other species. Akodon montensis was associated with high forest (HF), and H. megacephalus with bamboo understory (BU), whereas O. nigripes did not exhibit a habitat preference. The first two species' distributions within the landscape were found to be driven primarily by habitat selection, and O. nigripes by a behavioral response (avoidance) to the presence of the other two species. Moreover, habitat influences whether or not a particular species associates with, or avoids, conspecifics or other species.
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Affiliation(s)
- Robert D. Owen
- Department of Biological Sciences, Texas Tech University, Lubbock, TX 79409, USA; and Centro para el Desarrollo de la Investigación Científica, Raul Casal 2230, C.P. 1371, Asunción, Paraguay
| | - Jeremy V. Camp
- Department of Microbiology and Immunology, University of Louisville, Louisville, KY 40204, USA; and Institute of Virology, University of Veterinary Medicine, Vienna, Austria
| | - Richard Sage
- Sociedad Naturalista Andino Patagónica (SNAP), Paso Juramento 190, 3° piso, 8400 Bariloche, Río Negro, Argentina
| | - Laura Rodríguez
- Departamento de SIG, Fundación Moises Bertoni, Prócer Argäello 208 e/Mcal. López y Guido Boggiani, Asunción, Paraguay
| | - Vicente J. Martínez Bruyn
- Departamento de Biotecnología, Facultad de Ciencias Exactas y Naturales, Universidad Nacional de Asunción, San Lorenzo, Paraguay
| | - Ryan C. McAllister
- Department of Pharmacology and Toxicology, University of Louisville School of Medicine, Louisville, KY 40204, USA
| | - Colleen B. Jonsson
- Department of Microbiology, Immunology and Biochemistry, University of Tennessee Health Science Center, Memphis, TN 38103, USA
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Implications of an agricultural mosaic in small mammal communities. Mamm Biol 2019. [DOI: 10.1016/j.mambio.2019.09.010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Lopes MG, Muñoz-Leal S, de Lima JTR, Fournier GFDSR, Acosta IDCL, Martins TF, Ramirez DG, Gennari SM, Labruna MB. Ticks, rickettsial and erlichial infection in small mammals from Atlantic forest remnants in northeastern Brazil. INTERNATIONAL JOURNAL FOR PARASITOLOGY-PARASITES AND WILDLIFE 2018; 7:380-385. [PMID: 30370217 PMCID: PMC6199183 DOI: 10.1016/j.ijppaw.2018.10.001] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/05/2018] [Revised: 08/08/2018] [Accepted: 10/08/2018] [Indexed: 12/02/2022]
Abstract
We evaluated infection by Rickettsia spp. and Ehrlichia spp in small mammals and their ticks from two Atlantic forest conservation areas in the state of Rio Grande do Norte, northeastern Brazil. A total of 39 small mammals were captured during 2012–2013, encompassing 33 marsupials (29 Didelphis albiventris, four Monodelphis domestica), three Cricetidae rodents (two Necromys lasiurus, one Rattus rattus), one Caviomorpha rodent (Thrichomys apereoides) and two armadillos (Euphractus sexcinctus). The ticks Amblyomma auricularium, Ixodes loricatus, and Ornithodoros mimon were collected from D. albiventris, whereas only A. auricularium was collected from armadillos. Through immunofluorescence assay with Rickettsia spp. antigens, 6/28 (21%) D. albiventris and the single R. rattus specimen reacted to at least one rickettsial antigen, with highest seroprevalence and endpoint titers to Rickettsia amblyommatis. A total of 150 ticks (126 A. auricularium, nine I. loricatus, 15 O. mimon) was tested for rickettsial infection by PCR, which detected only R. amblyommatis in most of the A. auricularium ticks. Lung and spleen samples were collected from small mammals (two N. lasiurus, six D. albiventris, three M. domestica, one T. apereoides, one R. rattus) and were tested by PCR for Anaplasmataceae agents. The spleen from one D. albiventris contained a new ehrlichial agent, here named as Ehrlichia sp. strain Natal. Phylogenetic analysis inferred from the dsb gene of Ehrlichia spp. indicates that this novel agent is potentially a new species. Future studies should monitor the possible role of rickettsial and/or ehrlichial microorganisms as agents of emerging diseases in these degraded areas of Atlantic forest, just as has occurred with other agents in degraded areas of this biome in southeastern Brazil. Amblyomma auricularium, Ixodes loricatus and Ornithodoros mimon ticks were found. Infection by Rickettsia amblyommatis was detected in A. auricularium ticks. Wild small mammals presented serological evidence of R. amblyommatis infection. A potentially novel Ehrlichia species infected the opossum Didelphis albiventris.
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Affiliation(s)
- Marcos G Lopes
- Department of Preventive Veterinary Medicine and Animal Health, Faculty of Veterinary Medicine, University of São Paulo, Av. Prof. Orlando Marques de Paiva 87, Cidade Universitária, 05508-270, São Paulo, SP, Brazil
| | - Sebastián Muñoz-Leal
- Department of Preventive Veterinary Medicine and Animal Health, Faculty of Veterinary Medicine, University of São Paulo, Av. Prof. Orlando Marques de Paiva 87, Cidade Universitária, 05508-270, São Paulo, SP, Brazil
| | - Julia T Ribeiro de Lima
- Department of Preventive Veterinary Medicine and Animal Health, Faculty of Veterinary Medicine, University of São Paulo, Av. Prof. Orlando Marques de Paiva 87, Cidade Universitária, 05508-270, São Paulo, SP, Brazil
| | - Gislene Fatima da S Rocha Fournier
- Department of Preventive Veterinary Medicine and Animal Health, Faculty of Veterinary Medicine, University of São Paulo, Av. Prof. Orlando Marques de Paiva 87, Cidade Universitária, 05508-270, São Paulo, SP, Brazil
| | - Igor da Cunha L Acosta
- Department of Preventive Veterinary Medicine and Animal Health, Faculty of Veterinary Medicine, University of São Paulo, Av. Prof. Orlando Marques de Paiva 87, Cidade Universitária, 05508-270, São Paulo, SP, Brazil
| | - Thiago F Martins
- Department of Preventive Veterinary Medicine and Animal Health, Faculty of Veterinary Medicine, University of São Paulo, Av. Prof. Orlando Marques de Paiva 87, Cidade Universitária, 05508-270, São Paulo, SP, Brazil
| | - Diego G Ramirez
- Department of Preventive Veterinary Medicine and Animal Health, Faculty of Veterinary Medicine, University of São Paulo, Av. Prof. Orlando Marques de Paiva 87, Cidade Universitária, 05508-270, São Paulo, SP, Brazil
| | - Solange M Gennari
- Department of Preventive Veterinary Medicine and Animal Health, Faculty of Veterinary Medicine, University of São Paulo, Av. Prof. Orlando Marques de Paiva 87, Cidade Universitária, 05508-270, São Paulo, SP, Brazil.,Mestrado em Medicina e Bem estar animal, Universidade Santo Amaro, Av. Prof. Eneas de Siqueira Neto, 340, São Paulo, 04529-300, Brazil
| | - Marcelo B Labruna
- Department of Preventive Veterinary Medicine and Animal Health, Faculty of Veterinary Medicine, University of São Paulo, Av. Prof. Orlando Marques de Paiva 87, Cidade Universitária, 05508-270, São Paulo, SP, Brazil
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Determinants of home range size and spatial overlap of Gracilinanus agilis (Mammalia: Didelphidae) in central-western Brazil. MAMMALIA 2018. [DOI: 10.1515/mammalia-2016-0168] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Abstract
The use of space in mammals may vary according to sexual dimorphism, mating system and territorial behavior in order to ensure optimization of the reproductive success of each sex and the interactions with other species. In the present study, the determinants of home range (HR) size of males and females of Gracilinanus agilis (Burmeister 1854) were evaluated in a savanna remnant in central-western Brazil. We used live traps and capture-mark-recapture to estimate HR size. Using the method of minimum convex polygon, we estimated the HR of 24 individuals. The species showed sexual dimorphism, with males showing larger body size. The HR estimated was 0.38±0.41 ha and the highest estimated HR was for a male, with 2.08 ha. Females’ HR sizes varied according to body mass, food availability and number of captures. The more important predictor for males was the number of females found within their HRs. The overlapping areas between pairs of males were larger than those between pairs of females, suggesting that females have territorial behavior as they had mostly exclusive HRs. Considering that food availability was an important predictor for female HR size, we hypothesize that the territorial behavior in females is related to food resource.
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Zoonotic pathogens in Atlantic Forest wild rodents in Brazil: Bartonella and Coxiella infections. Acta Trop 2017; 168:64-73. [PMID: 28077317 DOI: 10.1016/j.actatropica.2017.01.003] [Citation(s) in RCA: 42] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2016] [Revised: 01/04/2017] [Accepted: 01/06/2017] [Indexed: 11/24/2022]
Abstract
Zoonotic pathogens comprise a significant and increasing fraction of all emerging and re-emerging infectious diseases that plague humans. Identifying host species is one of the keys to controlling emerging infectious diseases. From March 2007 until April 2012, we collected a total of 131 wild rodents in eight municipalities of Rio de Janeiro, Brazil. We investigated these rodents for infection with Coxiella burnetii, Bartonella spp. and Rickettsia spp. In total, 22.1% (29/131) of the rodents were infected by at least one pathogen; co-infection was detected in 1.5% (2/131) of rodents. Coxiella burnetii was detected in 4.6% (6/131) of the wild animals, 17.6% of the rodents harbored Bartonella spp. No cases of Rickettsia were identified. Bartonella doshiae and Bartonella vinsonii were the species found on the wild mammals. This report is the first to note C. burnetii, B. doshiae and B. vinsonii natural infections in Atlantic Forest wild rodents in Brazil. Our work highlights the potential risk of transmission to humans, since most of the infected specimens belong to generalist species that live near human dwellings.
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Vadell MV, García Erize F, Gómez Villafañe IE. Evaluation of habitat requirements of small rodents and effectiveness of an ecologically-based management in a hantavirus-endemic natural protected area in Argentina. Integr Zool 2017; 12:77-94. [PMID: 27135773 DOI: 10.1111/1749-4877.12207] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Hantavirus pulmonary syndrome is a severe cardio pulmonary disease transmitted to humans by sylvan rodents found in natural and rural environments. Disease transmission is closely linked to the ecology of animal reservoirs and abiotic factors such as habitat characteristics, season or climatic conditions. The main goals of this research were: to determine the biotic and abiotic factors affecting richness and abundance of rodent species at different spatial scales, to evaluate different methodologies for studying population of small rodents, and to describe and analyze an ecologically-based rodent management experience in a highly touristic area. A 4-year study of small rodent ecology was conducted between April 2007 and August 2011 in the most relevant habitats of El Palmar National Park, Argentina. Management involved a wide range of control and prevention measures, including poisoning, culling and habitat modification. A total of 172 individuals of 5 species were captured with a trapping effort of 13 860 traps-nights (1.24 individuals/100 traps-nights). Five rodent species were captured, including 2 hantavirus-host species, Oligoryzomys nigripes and Akodon azarae. Oligoryzomys nigripes, host of a hantavirus that is pathogenic in humans, was the most abundant species and the only one found in all the studied habitats. Our results are inconsistent with the dilution effect hypothesis. The present study demonstrates that sylvan rodent species, including the hantavirus-host species, have distinct local habitat selection and temporal variation patterns in abundance, which may influence the risk of human exposure to hantavirus and may have practical implications for disease transmission as well as for reservoir management.
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Affiliation(s)
- María Victoria Vadell
- Department of Ecology, Genetics and Evolution. Institute of Ecology, Genetics and Evolution (IEGEBA-CONICET), University of Buenos Aires, Buenos Aires, Argentina
| | - Francisco García Erize
- Department of Ecology, Genetics and Evolution. Institute of Ecology, Genetics and Evolution (IEGEBA-CONICET), University of Buenos Aires, Buenos Aires, Argentina
| | - Isabel Elisa Gómez Villafañe
- Department of Ecology, Genetics and Evolution. Institute of Ecology, Genetics and Evolution (IEGEBA-CONICET), University of Buenos Aires, Buenos Aires, Argentina
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Malange J, Izar P, Japyassú H. Personality and behavioural syndrome in Necromys lasiurus (Rodentia: Cricetidae): notes on dispersal and invasion processes. Acta Ethol 2016. [DOI: 10.1007/s10211-016-0238-z] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Callejón R, Robles MDR, Panei CJ, Cutillas C. Molecular diversification of Trichuris spp. from Sigmodontinae (Cricetidae) rodents from Argentina based on mitochondrial DNA sequences. Parasitol Res 2016; 115:2933-45. [PMID: 27083190 DOI: 10.1007/s00436-016-5045-y] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2016] [Accepted: 04/07/2016] [Indexed: 11/26/2022]
Abstract
A molecular phylogenetic hypothesis is presented for the genus Trichuris based on sequence data from mitochondrial cytochrome c oxidase 1 (cox1) and cytochrome b (cob). The taxa consisted of nine populations of whipworm from five species of Sigmodontinae rodents from Argentina. Bayesian Inference, Maximum Parsimony, and Maximum Likelihood methods were used to infer phylogenies for each gene separately but also for the combined mitochondrial data and the combined mitochondrial and nuclear dataset. Phylogenetic results based on cox1 and cob mitochondrial DNA (mtDNA) revealed three clades strongly resolved corresponding to three different species (Trichuris navonae, Trichuris bainae, and Trichuris pardinasi) showing phylogeographic variation, but relationships among Trichuris species were poorly resolved. Phylogenetic reconstruction based on concatenated sequences had greater phylogenetic resolution for delimiting species and populations intra-specific of Trichuris than those based on partitioned genes. Thus, populations of T. bainae and T. pardinasi could be affected by geographical factors and co-divergence parasite-host.
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Affiliation(s)
- Rocío Callejón
- Department of Microbiology and Parasitology, Faculty of Pharmacy, University of Sevilla, Prof. García González 2, Sevilla, 41012, Spain
| | - María Del Rosario Robles
- Centro de Estudios Parasitológicos y de Vectores (CEPAVE), CCT-CONICET-La Plata/Universidad Nacional de La Plata, La Plata, Buenos Aires, Argentina
| | - Carlos Javier Panei
- Virología, Facultad de Ciencias Veterinarias, Universidad Nacional de La Plata, La Plata, Buenos Aires, Argentina
- Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Buenos Aires, Argentina
| | - Cristina Cutillas
- Department of Microbiology and Parasitology, Faculty of Pharmacy, University of Sevilla, Prof. García González 2, Sevilla, 41012, Spain.
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Mello JHF, Moulton TP, Raíces DSL, Bergallo HG. About rats and jackfruit trees: modeling the carrying capacity of a Brazilian Atlantic Forest spiny-rat Trinomys dimidiatus (Günther, 1877) - Rodentia, Echimyidae - population with varying jackfruit tree (Artocarpus heterophyllus L.) abundances. BRAZ J BIOL 2015; 75:208-15. [PMID: 25945639 DOI: 10.1590/1519-6984.11613] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2013] [Accepted: 10/11/2013] [Indexed: 11/22/2022] Open
Abstract
We carried out a six-year study aimed at evaluating if and how a Brazilian Atlantic Forest small mammal community responded to the presence of the invasive exotic species Artocarpus heterophyllus, the jackfruit tree. In the surroundings of Vila Dois Rios, Ilha Grande, RJ, 18 grids were established, 10 where the jackfruit tree was present and eight were it was absent. Previous results indicated that the composition and abundance of this small mammal community were altered by the presence and density of A. heterophyllus. One observed effect was the increased population size of the spiny-rat Trinomys dimidiatus within the grids where the jackfruit trees were present. Therefore we decided to create a mathematical model for this species, based on the Verhulst-Pearl logistic equation. Our objectives were i) to calculate the carrying capacity K based on real data of the involved species and the environment; ii) propose and evaluate a mathematical model to estimate the population size of T. dimidiatus based on the monthly seed production of jackfruit tree, Artocarpus heterophyllus and iii) determinate the minimum jackfruit tree seed production to maintain at least two T. dimidiatus individuals in one study grid. Our results indicated that the predicted values by the model for the carrying capacity K were significantly correlated with real data. The best fit was found considering 20~35% energy transfer efficiency between trophic levels. Within the scope of assumed premises, our model showed itself to be an adequate simulator for Trinomys dimidiatus populations where the invasive jackfruit tree is present.
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Affiliation(s)
- J H F Mello
- Programa de Pós-Graduação em Ecologia e Evolução, Universidade do Estado do Rio de Janeiro, Rio de Janeiro, RJ, Brazil
| | - T P Moulton
- Departamento de Ecologia, Instituto de Biologia Roberto Alcântara Gomes, Universidade do Estado do Rio de Janeiro, Rio de Janeiro, RJ, Brazil
| | - D S L Raíces
- Instituto Chico Mendes de Conservação da Biodiversidade, Brasília, DF, Brazil
| | - H G Bergallo
- Departamento de Ecologia, Instituto de Biologia Roberto Alcântara Gomes, Universidade do Estado do Rio de Janeiro, Rio de Janeiro, RJ, Brazil
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Rocha RG, Ferreira E, Martins ICM, Costa LP, Fonseca C. Seasonally flooded stepping stones: emerging diversity of small mammal assemblage in the Amazonia-Cerrado ecotone, central Brazil. Zool Stud 2014. [DOI: 10.1186/s40555-014-0060-0] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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Maestri R, Galiano D, Kubiak BB, Marinho JR. Diversity of small land mammals in a subtropical Atlantic forest in the western region of the state of Santa Catarina, southern Brazil. BIOTA NEOTROPICA 2014. [DOI: 10.1590/1676-06032014012914] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Small land mammals possess features that significantly influence the dynamics of ecosystems and participate in various levels of the food web. In the Brazilian Atlantic Forest the richness of these animals is high, which makes them even more ecologically and numerically relevant in this environment. In this context, we investigated the species composition of small mammals in an unexplored area of southern Brazil, and compared the species composition of this area with other Atlantic Forest regions in order to understand how this community is related to others. The study area was located in an interior Atlantic forest formation, at a transition region between deciduous and Araucaria forests. Small mammals were captured at five collection points using pitfall traps. We compared the species composition found in our studied area with the composition of other 11 studies in different regions by a cluster analysis, and we investigated the presence of spatial autocorrelation between communities with a Mantel test. We recorded 779 individuals from 21 species of small rodents (15 species) and marsupials (six species) during the 13 months of the collection period. This richness was high compared to other studies conducted in the Atlantic Forest formations near to coastline and in interior forest formations. This may be a result of the conditions provided by this transition area (deciduous and Araucaria forests), where could be found elements of the both forests formations, which probably allows the establishment of small mammal species from both forest types. Despite differences in sampling effort of the studies, our results suggest that the interior forest formations may harbor a number of species comparable to the formations near the coast. The species composition of this area was similar to those found in other interior forest formations with the same phytophysiognomy characteristics and at nearby regions, and it was less similar to the distant formations located in southeastern and northeastern Brazil and nearby to the coastline. This can be a result of both the spatial autocorrelation (i.e. more nearby communities tend to have more similar species composition) and the differences of forest characteristics among regions.
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Affiliation(s)
- Renan Maestri
- Universidade Regional Integrada do Alto Uruguai e das Missões, Brazil; Universidade Federal do Rio Grande do Sul, Brazil
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Lareschi M, Galliari C. Multivariate discrimination among cryptic mites of the genus Androlaelaps (Acari: Mesostigmata: Laelapidae) parasitic of sympatric akodontine rodents (Cricetidae: Sigmodontinae) in northeastern Argentina: possible evidence of host switch followed by speciation, with the description of two new species. EXPERIMENTAL & APPLIED ACAROLOGY 2014; 64:479-99. [PMID: 25039004 DOI: 10.1007/s10493-014-9839-2] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/14/2014] [Accepted: 07/10/2014] [Indexed: 05/15/2023]
Abstract
Laelapids are among the most common ectoparasites of rodents. Currently, it is under discussion whether there is a single polixenous species that parasites a variety of hosts, or whether there are cryptic species highly host specific. Herein, multivariate morphometric analyses of cryptic sympatric laelapids of the genus Androlaelaps allowed us to identify different species. These species are specific of their akodontine hosts, Akodon montensis and Thaptomys nigrita, in localities situated in northeastern Argentina. In addition, we analyzed similar laelapids associated with the akodontines Deltamys kempi and Akodon cursor. Using principle component analyses we differentiated four laelapid species, each one host specific, independent of sympatry of the hosts, and without geographical variation. From these four species, we described two new species (Androlaelaps navonae n. sp. and Androlaelaps wingei n. sp.). We determined the four species based on a range of variations in several characters, mainly size. These four laelapid species belong to the Androlaelaps rotundus species group, specific to akodontines. These species are very similar among them but differ from the remainder species of the group by their small size, distance between j6 setae similar to the distance between the z5 setae, strong ventral setae, opisthogaster with 13 pairs of strong setae (one close to the distal margin of epigynal shield), and anal shield wider than long. Further studies will elucidate whether they constitute a new laelapid genus. Phylogenetic and ecological factors influencing host-specificity are discussed, and we propose that host colonization could have taken place by host switching of a single laelapid species among rodent species, followed by speciation.
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Affiliation(s)
- Marcela Lareschi
- Centro de Estudios Parasitológicos y de Vectores CEPAVE (CCT- La Plata, CONICET-UNLP), Bulevar 120 e/Av. 60 y calle 64, B1902CHX, La Plata, Argentina,
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Robles MDR, Cutillas C, Panei CJ, Callejón R. Morphological and molecular characterization of a new Trichuris species (Nematoda- Trichuridae), and phylogenetic relationships of Trichuris species of Cricetid rodents from Argentina. PLoS One 2014; 9:e112069. [PMID: 25393618 PMCID: PMC4231040 DOI: 10.1371/journal.pone.0112069] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2014] [Accepted: 10/09/2014] [Indexed: 11/30/2022] Open
Abstract
Populations of Trichuris spp. isolated from six species of sigmodontine rodents from Argentina were analyzed based on morphological characteristics and ITS2 (rDNA) region sequences. Molecular data provided an opportunity to discuss the phylogenetic relationships among the Trichuris spp. from Noth and South America (mainly from Argentina). Trichuris specimens were identified morphologically as Trichuris pardinasi, T. navonae, Trichuris sp. and Trichuris new species, described in this paper. Sequences analyzed by Maximum Parsimony, Maximum Likelihood and Bayesian inference methods showed four main clades corresponding with the four different species regardless of geographical origin and host species. These four species from sigmodontine rodents clustered together and separated from Trichuris species isolated from murine and arvicoline rodents (outgroup). Different genetic lineages observed among Trichuris species from sigmodontine rodents which supported the proposal of a new species. Moreover, host distribution showed correspondence with the different tribes within the subfamily Sigmodontinae.
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Affiliation(s)
- María del Rosario Robles
- Centro de Estudios Parasitológicos y de Vectores (CEPAVE), CCT- CONICET- La Plata/Universidad Nacional de La Plata, La Plata, Buenos Aires, Argentina
- Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Buenos Aires, Argentina
- * E-mail:
| | - Cristina Cutillas
- Departmento de Microbiología y Parasitología, Facultad de Farmacia, Universidad de Sevilla, Sevilla, España
| | - Carlos Javier Panei
- Virología, Facultad de Ciencias Veterinarias, Universidad Nacional de La Plata, La Plata, Buenos Aires, Argentina
- Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Buenos Aires, Argentina
| | - Rocío Callejón
- Departmento de Microbiología y Parasitología, Facultad de Farmacia, Universidad de Sevilla, Sevilla, España
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Galiano D, Kubiak BB, Estevan C, Moraes RM, Malysz M, Hepp LU, Marinho JR, de Freitas TRO. Small mammals in Araucaria rain forest: linking vegetal components and the arthropod fauna with rodent community. STUDIES ON NEOTROPICAL FAUNA AND ENVIRONMENT 2014. [DOI: 10.1080/01650521.2014.953313] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Bezerra AMR, Lazar A, Bonvicino CR, Cunha AS. Subsidies for a poorly known endemic semiarid biome of Brazil: non-volant mammals of an eastern region of Caatinga. Zool Stud 2014. [DOI: 10.1186/1810-522x-53-16] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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Cerboncini RAS, Rubio MBG, Bernardi IP, Braga TV, Roper JJ, Passos FC. Small mammal community structure and vertical space use preferences in nonfragmented Atlantic Forest. MAMMALIA 2014. [DOI: 10.1515/mammalia-2013-0128] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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Leiner NO, Silva WR. Non-volant small mammals at an Atlantic forest area situated nearby a limestone quarry (Limeira quarry), state of São Paulo, Brazil. BIOTA NEOTROPICA 2012. [DOI: 10.1590/s1676-06032012000400020] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Our aim was to survey the non-flying small mammals inhabiting an Atlantic forest area situated nearby a limestone quarry (Limeira quarry), located at Ribeirão Grande municipality (SP), southeastern Brazil. Species were captured with pitfall and Sherman traps along eight pairs of 60 m transects distributed at four different distances from the quarry (60, 220, 740 and 1300 m). Between October 2005 and January 2008, 20 small mammal species (11 rodents and nine marsupials) were captured through 4080 pitfall trap-nights and 2040 Sherman trap-nights. The high values of richness, diversity (H' = 2.65) and equability (J = 0.88), and the presence of endemic and threatened species indicates a preserved study site and small mammal assemblage. Marmosops incanus, Monodelphis americana and Oligoryzomys nigripes were the commonest species at the study site. Trapping sites located closer to the quarry (60 and 220 m away from the quarry) presented lower richness and were dominated by disturbance-tolerant species, such as O. nigripes, that usually benefit from habitat alterations. On the other hand, sites located away from the quarry and closer to Serra do Mar Protected Area (740 and 1300 m away from the quarry) presented higher richness and diversity, and a higher abundance of disturbance-intolerant species. These results suggest a negative distance-dependent impact of quarrying on small mammal communities. In this way, our results point out to the importance of long-term monitoring of quarrying impacts on small non-flying mammal communities and populations, and the need of conservation strategies in order to ensure species persistence in these areas.
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Mendes-Oliveira AC, Santos PGPD, Carvalho-Júnior OD, Montag LFDA, Lima RCSD, Maria SLSD, Rossi RV. Edge effects and the impact of wildfires on populations of small non-volant mammals in the forest-savanna transition zone in Southern Amazonia. BIOTA NEOTROPICA 2012. [DOI: 10.1590/s1676-06032012000300004] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The impact of fire and edge effects on the community of small non-volant mammals was investigated in transitional Amazon forest within a matrix of soybean plantations. The animals were live trapped on 24 line transects, of which 16 were distributed in unburned areas and 8 in a burned area. A total of 11 species was recorded, including six rodents and five marsupials. The abundance and richness of small mammals appeared to decrease in burned areas, although this impact appeared to mask edge effects. In the absence of fire impacts, a positive relationship was found between mammal abundance and the distance from the forest edge. The impact of the edge effect on the diversity of small mammals appears to be influenced by the type of anthropogenic matrix and the ecological characteristics of the different species.
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Napoli R, Caceres N. Absence of edge effect on small mammals in woodland-savannah remnants in Brazil. COMMUNITY ECOL 2012. [DOI: 10.1556/comec.13.2012.1.2] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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Costa-Silva M, Barros LDA, Garcia JS, Neves RH, Rodrigues-Silva R, Machado-Silva JR, Maldonado-Júnior A. Susceptibility of a Brazilian wild rodent isolate of Schistosoma mansoni to praziquantel in mice. Exp Parasitol 2012; 130:394-9. [PMID: 22343042 DOI: 10.1016/j.exppara.2012.02.002] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2011] [Revised: 01/31/2012] [Accepted: 02/02/2012] [Indexed: 10/14/2022]
Abstract
The therapeutic effects of praziquantel (PZQ) against a Schistosoma mansoni isolate derived from Nectomys squamipes (isolate R) and a susceptible isolate (BH) were analyzed in Swiss mice by fecal egg counting, adult worm reduction and oogram pattern. Infected mice were orally administrated with 62.5mg/kg (group 1), 125mg/kg (group 2), 250mg/kg (group 3) and 500mg/kg (group 4), each dose divided over 3 days (49, 50 and 51 days after infection). The data were analyzed using one-way analysis of variance (ANOVA). In regard to isolate R, no fecal eggs were observed with 250 mg/Kg and 500 mg/kg (p<0.05), whereas BH excretion reached zero with all doses. Mean worm burden reduction was significantly (p<0.05) higher at the two highest concentrations, regardless of isolate. At 62.5mg/kg, the percentage of immature eggs varied from 17% (isolate R) to 38% (isolate BH). At 125 mg/kg, the percentage of immature eggs varied from 20% (isolate R) to 16% (isolate BH). At 250 mg/kg, immature eggs dropped significantly to 1% (isolate R) and 4% (isolate BH). At 500 mg/kg, no immature eggs were found in isolate R, whereas in BH was 8%. No dosage significantly (p>0.05) affected the percentage of mature eggs, regardless of isolate. There was a large increase (p<0.001) in the percentages of dead eggs in all treated groups of 62% and 64% in groups 3 and 4, respectively (isolate R). The percentage of dead eggs rose from 34% (group 1) to 58% (group 3) in isolate BH. Although group 4 showed lowest increase in the percentage of dead eggs (46%), it was higher (p<0.001) compared to the 8% in the control. Our findings indicate that the wild isolate from N. squamipes is susceptible to PZQ.
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Affiliation(s)
- Michele Costa-Silva
- Laboratory of Biology and Parasitology of Wild Mammal Reservoirs, Oswaldo Cruz Institute, Oswaldo Cruz Foundation, Av. Brasil 4365, Manguinhos, 21045-900 Rio de Janeiro, Brazil
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Quaresma PF, Rêgo FD, Botelho HA, da Silva SR, Moura Júnior AJ, Teixeira Neto RG, Madeira FM, Carvalho MB, Paglia AP, Melo MN, Gontijo CMFF. Wild, synanthropic and domestic hosts of Leishmania in an endemic area of cutaneous leishmaniasis in Minas Gerais State, Brazil. Trans R Soc Trop Med Hyg 2011; 105:579-85. [PMID: 21890159 DOI: 10.1016/j.trstmh.2011.07.005] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2010] [Revised: 07/08/2011] [Accepted: 07/08/2011] [Indexed: 11/19/2022] Open
Abstract
Domestic, synanthropic and wild hosts of Leishmania spp. parasites were studied in an area endemic for American tegumentary leishmaniasis (ATL), specifically in northern Minas Gerais State, Brazil. Domestic dogs and small forest mammals are reservoir hosts for L. (Leishmania) infantum. However, the role that these animals play in the transmission cycle of the Leishmania spp. that cause cutaneous leishmaniasis is not well known. This study evaluated 72 rodents, 25 marsupials and 98 domestic dogs found in two villages of the Xakriabá Indigenous Territory, an area of intense ATL transmission. A total of 23 dogs (23.47%) were shown to be positive according to at least one test; 8 dogs (8.16%) tested positive in a single serological test and 15 dogs (15.31%) tested positive by IFAT and ELISA. Eleven dogs were euthanised to allow for molecular diagnosis, of which nine (81.8%) tested positive by PCR for Leishmania in at least one tissue. Seven animals were infected only with L. (L.) infantum, whilst two displayed a mixed infection of L. (L.) infantum and L. (V.) braziliensis. Isoenzymatic characterisation identified L. (L.) infantum parasites isolated from the bone marrow of two dogs. Of the 97 small mammals captured, 24 tested positive for Leishmania by PCR. The results showed that L. (V.) braziliensis, L. (L.) infantum and L. (V.) guyanensis are circulating among wild and synanthropic mammals present in the Xakriabá Reserve, highlighting the epidemiological diversity of ATL in this region.
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Affiliation(s)
- Patrícia F Quaresma
- Laboratório de Leishmanioses, Centro de Pesquisas René Rachou, Fundação Oswaldo Cruz, Av. Augusto de Lima, 1715 Barro Preto, 30190-002 Belo Horizonte, Minas Gerais, Brazil.
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Melo G, Sponchiado J, Machado A, Cáceres N. Small-mammal community structure in a South American deciduous Atlantic Forest. COMMUNITY ECOL 2011. [DOI: 10.1556/comec.12.2011.1.8] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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Carmignotto AP, Aires CC. Mamíferos não voadores (Mammalia) da Estação Ecológica Serra Geral do Tocantins. BIOTA NEOTROPICA 2011. [DOI: 10.1590/s1676-06032011000100029] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
A comunidade de mamíferos terrestres foi amostrada em três localidades (1-Mateiros, TO; 2- Rio da Conceição, TO e 3- Formosa do Rio Preto, BA) no interior da Estação Ecológica Serra Geral do Tocantins. Para o registro dos marsupiais e pequenos roedores foram utilizadas armadilhas convencionais (5.396 armadilhas.noite) e armadilhas de queda (5.300 pitfalls.noite) nas diferentes fitofisionomias encontradas, entre elas: campo úmido, campo limpo, campo sujo, campo cerrado, cerrado sensu stricto, cerrado com afloramentos rochosos, mata de galeria e mata de galeria úmida. No caso dos mamíferos de médio e grande porte, foram obtidos registros casuais através de observação direta e evidências indiretas (rastros, fezes, crânios e carcaças de animais encontrados mortos). Foram amostradas 24 espécies de pequenos mamíferos e 17 espécies de mamíferos de médio e grande porte, totalizando 41 espécies para a região. Considerando-se os pequenos mamíferos, a comunidade foi representada por várias espécies raras e de abundância intermediária, e poucas espécies muito abundantes. Os roedores cricetídeos dominaram tanto em número de espécies (14) quanto em abundância (50% da comunidade). As espécies se distribuíram, basicamente, em dois tipos de fisionomias: um grupo esteve restrito aos ambientes florestais, e outro às formações abertas, demonstrando a grande seletividade de hábitats e a importância de se amostrar o mosaico de hábitats presente na região para uma melhor caracterização da diversidade deste grupo de mamíferos. Em termos biogeográficos, a fauna de pequenos mamíferos amostrada apresentou certa sobreposição com a fauna da Caatinga e da Amazônia, evidenciando a importância destes domínios para a composição de espécies das comunidades que habitam a porção norte do Cerrado, além da presença de espécies endêmicas e de distribuição geográfica restrita ao norte do domínio, caracterizando uma comunidade distinta de outras regiões do Cerrado. Em relação aos mamíferos de médio e grande porte, a presença de um elevado número de espécies ameaçadas de extinção (10) também ressalta a importância da preservação desta região.
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de Oliveira RC, Padula PJ, Gomes R, Martinez VP, Bellomo C, Bonvicino CR, e Lima DIF, Bragagnolo C, Caldas AC, D'Andrea PS, de Lemos ER. Genetic Characterization of Hantaviruses Associated with Sigmodontine Rodents in an Endemic Area for Hantavirus Pulmonary Syndrome in Southern Brazil. Vector Borne Zoonotic Dis 2011; 11:301-14. [DOI: 10.1089/vbz.2010.0001] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Affiliation(s)
| | | | - Raphael Gomes
- Laboratório de Hantaviroses e Rickettsioses, Instituto Oswaldo Cruz, FIOCRUZ, Rio de Janeiro, Brazil
| | | | - Carla Bellomo
- INEI-ANLIS “Dr C.G. Malbrán,” Buenos Aires, Argentina
| | - Cibele R. Bonvicino
- Instituto Nacional de Câncer, Ministério da Saúde, Rio de Janeiro, Brazil
- Laboratório de Biologia e Parasitologia de Mamíferos Silvestres Reservatórios, Instituto Oswaldo Cruz, Rio de Janeiro, Brazil
| | - Danúbia Inês Freire e Lima
- Laboratório de Biologia e Parasitologia de Mamíferos Silvestres Reservatórios, Instituto Oswaldo Cruz, Rio de Janeiro, Brazil
| | - Camila Bragagnolo
- Laboratório de Hantaviroses e Rickettsioses, Instituto Oswaldo Cruz, FIOCRUZ, Rio de Janeiro, Brazil
| | | | - Paulo S. D'Andrea
- Laboratório de Biologia e Parasitologia de Mamíferos Silvestres Reservatórios, Instituto Oswaldo Cruz, Rio de Janeiro, Brazil
| | - Elba R.S. de Lemos
- Laboratório de Hantaviroses e Rickettsioses, Instituto Oswaldo Cruz, FIOCRUZ, Rio de Janeiro, Brazil
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Moreira JC, de Oliveira JA. Evaluating Diversification Hypotheses in the South American Cricetid Thaptomys nigrita (Lichtenstein, 1829) (Rodentia: Sigmodontinae): An Appraisal of Geographical Variation Based on Different Character Systems. J MAMM EVOL 2011. [DOI: 10.1007/s10914-011-9155-0] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Variation in the helminth community structure of three sympatric sigmodontine rodents from the coastal Atlantic Forest of Rio de Janeiro, Brazil. J Helminthol 2010; 85:171-8. [DOI: 10.1017/s0022149x10000398] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
AbstractOne hundred and eighty specimens of sigmodontine rodents living in sympatric conditions were collected in the Atlantic Forest in the state of Rio de Janeiro, Brazil (25Akodon cursor, 98Akodon montensisand 57Oligoryzomys nigripes) to examine whether the helminth structure and component communities can be characterized among these three closely related rodents. The parasite species richness was 9 inA. cursor, 12 inA. montensisand 12 inO. nigripes. Five species were common to the three rodent species, and eight were common toA. cursorandA. montensis. The trichostrongylids –Stilestrongylus etainA. cursor,S. aculeatainA. montensisandS. lanfrediaeinO. nigripes– were the species with highest dominance frequency and determined the characterization of individual community structures. The prevalence and abundance of concurrent helminth species among rodents were significantly different. Canonical multivariate analysis demonstrated a similar helminth community structure betweenA. cursorandA. montensisbut a high discrepancy betweenAkodonspp.and O. nigripes. Thus, the data indicated that small rodents such asA. cursor,A. montenisandO. nigripesthat are sympatric and phylogenetically related have a different community structure, but similar component community, suggesting the role of helminth specificity and the hosts' habitats as determinants in structuring their helminth communities.
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Augusto Prevedello J, Garcia Rodrigues R, Monteiro-Filho ELDA. Habitat selection by two species of small mammals in the Atlantic Forest, Brazil: Comparing results from live trapping and spool-and-line tracking. Mamm Biol 2010. [DOI: 10.1016/j.mambio.2009.11.002] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Santos RAL, Henriques RPB. Variação espacial e influência do habitat na estrutura de comunidades de pequenos mamíferos em áreas de campo rupestre no Distrito Federal. BIOTA NEOTROPICA 2010. [DOI: 10.1590/s1676-06032010000100002] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
No presente estudo foram investigadas as comunidades de pequenos mamíferos em campos rupestres do Distrito Federal (DF). Foram analisadas a composição, abundância e riqueza e suas relações com a estrutura do habitat e se existe variação espacial significativa na composição de espécies entre os sítios de campo rupestre. Os pequenos mamíferos foram estudados com o método de marcação e recaptura em sete sítios. O esforço total para os sete sítios foi de 5.680 armadilhas-noite, sendo capturados 157 indivíduos e oito espécies de roedores. Calomys tener e Cerradomys scotti foram as espécies mais abundantes do estudo, com 47,1 e 18,0% do total de indivíduos, respectivamente. Ambas estavam presentes em todos os sítios amostrados. Os resultados mostraram que as áreas de campo rupestre do DF apresentam uma fauna de pequenos mamíferos (média de quatro com amplitude de variação de três a cinco espécies), comparáveis a de outras fisionomias de Cerrado. A complexidade do habitat mostrou-se como um dos principais determinantes na composição das comunidades de pequenos mamíferos em campo rupestre. Houve distinção entre as comunidades de pequenos mamíferos dos sítios da APA Gama e Cabeça de Veado e dos sítios da APA de Cafuringa. Foi constatada influência da distância entre os locais sobre a composição de espécies, com a similaridade diminuindo com o aumento da distância entre os sítios. As diferenças nas condições ambientais, na estrutura do habitat e o fato de tratar-se de duas possíveis regiões biogeográficas podem explicar as diferenças faunísticas entre as duas regiões.
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Cáceres NC, Nápoli RP, Casella J, Hannibal W. Mammals in a fragmented savannah landscape in south-western Brazil. J NAT HIST 2010. [DOI: 10.1080/00222930903477768] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Affiliation(s)
- Nilton C. Cáceres
- a Laboratory of Mammal Ecology, Departamento de Biologia , Universidade Federal de Santa Maria , Camobi, Santa Maria , RS , 97.110-970 , Brazil
| | - Rodrigo P. Nápoli
- b Bioconsult Associados Ltda. R. Pe. Agostinho , 875/11A, Curitiba , PR , 80430-050 , Brazil
| | - Janaina Casella
- c Programa de Pós-Graduação em Ecologia e Conservação, CCBS , Universidade Federal do Mato Grosso do Sul , Cx.P. 549, Campo Grande , MS , 79.070-900 , Brazil
| | - Wellington Hannibal
- d Rua Pedro Pace , 537, Bairro Serraria, Aquidauana , MS , 79.200-000 , Brazil
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Pinto IDS, Loss ACC, Falqueto A, Leite YLR. Pequenos mamíferos não voadores em fragmentos de Mata Atlântica e áreas agrícolas em Viana, Espírito Santo, Brasil. BIOTA NEOTROPICA 2009. [DOI: 10.1590/s1676-06032009000300030] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Nós inventariamos os pequenos mamíferos não-voadores em Viana, Espírito Santo, sudeste do Brasil, em 1981-1982 e 2006-2007. Foram capturados 439 pequenos mamíferos não-voadores pertencentes a três ordens (Didelphimorphia, Rodentia e Lagomorpha) e seis famílias (Didelphidae, Sciuridade, Cricetidae, Muridae, Echimyidae e Leporidae). As espécies mais abundantes foram os roedores Akodon cursor e Nectomys squamipes e o marsupial Metachirus nudicaudatus. Registramos pela primeira vez a ocorrência do roedor equimídeo Euryzygomatomys spinosus no estado do Espírito Santo. A riqueza específica (S = 21) e o índice de diversidade de Shannon (H = 2,23) estão entre os maiores registrados para pequenos mamíferos da Mata Atlântica no estado, mesmo quando comparados aos valores obtidos para unidades de conservação. Esses maiores valores de riqueza e diversidade encontrados estão provavelmente associados à heterogeneidade de hábitat e evidenciam a necessidade de conservação dos fragmentos florestais de Viana, os quais são importantes depositários da biodiversidade da Mata Atlântica.
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Martin PS, Gheler-Costa C, Verdade LM. Microestruturas de pêlos de pequenos mamíferos não-voadores: chave para identificação de espécies de agroecossistemas do estado de São Paulo, Brasil. BIOTA NEOTROPICA 2009. [DOI: 10.1590/s1676-06032009000100022] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Características microestruturais dos pêlos vêm sendo usadas para identificação de espécies em pesquisas taxonômicas, ecológicas, paleontológicas, arqueológicas e forenses. Este estudo tem como objetivo a descrição da estrutura dos pêlos de algumas espécies de pequenos mamíferos não-voadores comumente encontrados em agroecossistemas do Estado de São Paulo. Os pêlos foram coletados do dorso de espécimes previamente identificados coletados em áreas de agricultura (canavial), pastagens, silvicultura (plantio de eucalipto) e fragmentos de vegetação nativa (floresta semidecídua e cerrado). O microscópio óptico apresentou limitações para a descrição do formato e borda das escamas, os quais foram descritos através do uso de microscópio eletrônico de varredura. Uma chave de identificação dicotômica é apresentada para 11 espécies de pequenos mamíferos não-voadores (sete roedores e quatro marsupiais).
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Cáceres NC, Casella J, Vargas CF, Prates LZ, Tombini AAM, Goulart CS, Lopes WH. Distribuição geográfica de pequenos mamíferos não voadores nas bacias dos rios Araguaia e Paraná, região centro-sul do Brasil. IHERINGIA. SERIE ZOOLOGIA 2008. [DOI: 10.1590/s0073-47212008000200001] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Realizaram-se amostragens de pequenos mamíferos em duas bacias hidrográficas do Brasil central pertencentes aos rios Araguaia e Paraná com intuito de descrever a composição de espécies de pequenos mamíferos de hábito florestal e comparar suas distribuições geográficas. Quatorze pontos de coleta foram amostrados, subdivididos em oito na bacia do Rio Paraná e seis na bacia do Rio Araguaia. Foram registradas 20 espécies de pequenos mamíferos na região (oito de marsupiais e 12 de roedores), sendo 16 delas por meio de armadilhas metálicas (5.253 armadilhas-noite) e oito delas por meio de armadilhas de queda (224 baldes-noite), totalizando 161 capturas de 139 indivíduos. A bacia do Rio Paraná apresentou 16 espécies (armadilhas-noite: 3.115; baldes-noite: 104) e a bacia do Araguaia apresentou 11 espécies (armadilhas-noite: 2.138; baldes-noite: 120), sendo que as riquezas foram similares quando aplicado o método da rarefação. Das 20 espécies registradas, sete (35%) ocorreram em ambas as bacias. Apesar da elevada riqueza de espécies amostrada, destacou-se a elevada abundância do marsupial Didelphis albiventris Lund, 1840. As espécies de marsupiais amostradas foram D. albiventris, Caluromys philander (Linnaeus, 1758), Cryptonanus cf. agricolai Voss, Lunde & Jansa, 2005, Gracilinanus agilis (Burmeister, 1854), G. microtarsus (Wagner, 1842), Lutreolina crassicaudata (Desmarest, 1804), Marmosa murina (Linnaeus, 1758), e Philander opossum (Linnaeus, 1758). As espécies de roedores amostradas foram Akodon gr. cursor, Calomys tener (Winge, 1887), Nectomys rattus (Pelzen, 1883), N. squamipes (Brants, 1827), Oecomys bicolor (Tomes, 1860), Oryzomys maracajuensis Langguth & Bonvicino, 2002, Oryzomys cf. marinhus, O. megacephalus (Fischer, 1814), Oligoryzomys fornesi (Massoia, 1973), Oligoryzomys sp., Proechimys longicaudatus (Rengger, 1830) e P. roberti (Thomas, 1901). A ampliação da distribuição de algumas espécies é discutida, assim como aspectos biogeográficos. A Serra dos Caiapós pode ter sido uma barreira geográfica para algumas espécies de pequenos mamíferos em face da retração e expansão das florestas ocorridas no passado.
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Püttker T, Meyer‐Lucht Y, Sommer S. Fragmentation effects on population density of three rodent species in secondary Atlantic Rainforest, Brazil. STUDIES ON NEOTROPICAL FAUNA AND ENVIRONMENT 2008. [DOI: 10.1080/01650520701553651] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Püttker T, Meyer-Lucht Y, Sommer S. Effects of fragmentation on parasite burden (nematodes) of generalist and specialist small mammal species in secondary forest fragments of the coastal Atlantic Forest, Brazil. Ecol Res 2007. [DOI: 10.1007/s11284-007-0366-z] [Citation(s) in RCA: 44] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Ribeiro R, Marinho-Filho J. Estrutura da comunidade de pequenos mamíferos (Mammalia, Rodentia) da Estação Ecológica de Águas Emendadas, Planaltina, Distrito Federal, Brasil. ACTA ACUST UNITED AC 2005. [DOI: 10.1590/s0101-81752005000400014] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Foram investigadas, no presente estudo a composição de espécies e a abundância de uma comunidade de pequenos mamíferos presentes nos campos de murundus, um tipo fitofisionômico característico da região central dos Cerrados brasileiros. Duas grades de armadilhas do tipo Sherman foram montadas e oito espécies de roedores foram capturadas. Não foi registrada a presença de nenhum marsupial na região. As espécies mais abundantes foram Bolomys lasiurus (Lund, 1841), Thalpomys lasiotis Thomas, 1916 e Calomys tener (Winge, 1888). Durante a estação chuvosa, B. lasiurus foi a espécie mais abundante, ao contrário de T. lasiotis que apresentou maior número de indivíduos durante o período seco. Esta distinção com relação à abundância dos indivíduos dessas duas espécies pode ser um mecanismo de adaptação que permite a coexistência nos mesmos habitats.
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